InterNACHI "The Inspectors Journal®"

When homes lose too much air pressure due to exhaust fans and other appliances it becomes possible for backdrafting to occur. This is a common way for dangerous gases such as carbon monoxide to enter the living space unnoticed and harm or kill the occupants. Luckily, it is sometimes possible to test for backdrafting. To find out more about how it happens and how inspectors can test for it, check out our new article on backdrafting for inspectors.